Abstract: Aryldiamine charge transporting molecules for a charge transport layer of an imaging member have a higher mobility by increasing the number of phenyl groups between the nitrogen atoms of the aryldiamine.

Abstract: An electrophotographic photosensitive member includes a charge generating material and a charge transfer material.

Abstract: The present invention relates to a novel stilbene derivative, which is a stilbene compound wherein molecular structures of triphenylamino groups located at both sides of a benzene ring in a molecular center are unsymmetric, and an electrophotosensitive material having high sensitivity and improved repeatability, comprising a conductive substrate and a photosensitive layer formed on the substrate, the photosensitive layer containing the derivative.

Abstract: To provide compounds, which are suitable for use as an organic luminescent material capable of developing intense luminescence which is yellow to red, and a process for preparing in general and high efficiency. A bis(aminostyryl)benzene compound of the following general formula [I] is provided wherein R2 and R3 independently represent an unsubstituted aryl group, and R1 and R4 independently represent an aryl group, and R5 to R8, independently represent a cyano group or the like. A process for the preparation thereof is described wherein a 4-(N,N-diarylamino)benzaldehyde and a diphosphonic acid ester or diphosphonium are subjected to condensation reaction. Intermediates of the bis(aminostyryl)benzene compound are also described.

Abstract: A high-sensitivity and long-life electrophotographic photoreceptor comprising an electroconductive substrate and at least a photosensitive layer on the electroconductive substrate is provided, wherein the photosensitive layer contains a polyarylate resin not having a nitrogen atom in its repeating unit, and the Hall mobility at an electric field strength of 3×105 (V/cm) and at a temperature of 21° C. of the photosensitive layer is 3×10−6 (cm2/Vs) or more.

Abstract: An electrophotographic photosensitive member is comprised of an aluminum substrate and a photosensitive layer provided thereon. The surface substrate on the side of the photosensitive member contains the elements aluminum, oxygen and titanium, or the elements aluminum, oxygen and zirconium. The photosensitive layer contains chlorogallium phthalocyanine, hydroxygallium phthalocyanine or oxytitanium phthalocyanine. The oxytitanium phthalocyanine has an intense peak at each of the Bragg's angles (2&thgr;G+0.2°) shown in any one of the specific five groups in CuK&agr;-characteristic X-ray diffraction.

Abstract: Disclosed are novel compounds useful in electrophotographic photoreceptors as charge-transporting materials having good miscibility with binder polymers and capable of forming a thin stable organic film having a high concentration; and an electrophotographic photoreceptor containing the same. The compounds are bis(3,4-methylenedioxyphenylamino) derivatives represented by general formula (1): wherein Ar1 and Ar2 each is an optionally substituted aryl group and Ar3 is a phenylene group or an optionally substituted biphenylene group.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed on the support and contains as an effective component an aromatic polycarbonate resin having a structural unit of formula (I), or the structural unit of formula (I) and a structural unit of formula (II): wherein Ar1 to Ar5, R1, and X are as specified in the specification.

Abstract: A method of producing an aromatic polycarbonate resin includes the step of carrying out solution polymerization of a diphenol compound having a triarylamine structure with a diol compound of formula (I): wherein R1 and R2 are each independently a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a halogen atom; a and b are each independently an integer of 0 to 4; and Y is —COO— or in which Z is a substituted or unsubstituted bivalent aliphatic group or a substituted or unsubstituted arylene group.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed thereon and contains an aromatic polycarbonate resin including at least a structural unit of formula (1): wherein a, b, c and d are each independently an integer of 0 to 4; n is an integer of 0 or 1; and R1, R2, R3 and R4 are each independently a halogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group, and R1, R2, R3 and R4 may each be the same or different when a, b, c and d are each an integer of 2, 3 or 4. Further, there are provided aromatic polycarbonate resins each including the structural unit of formula (1) and a structural unit with charge transporting properties.

Abstract: A crack resistant, curl-free electrophotographic imaging member includes a charge transport layer comprising an active charge transporting polymeric tetraaryl-substituted biphenyidiamine and a plasticizer.

Abstract: Disclosed are a stilbene derivative having the general formula (1) and a production thereof, and the electrophotosensitive material comprises a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein the photosensitive layer contains a stilbene derivative (1): wherein R1 and R3 represent an alkyl group which may have a substituent, an alkoxy group which may have a substituent or the like, and R2 and R4 represent a hydrogen atom, an alkyl group which may have a substituent or the like.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed thereon and contains as an effective component an aromatic polycarbonate resin having a structural unit of formula (1), two structural units of formula (1) and (2), or a repeat unit of formula (3): wherein R1 and R2, Ar1 to Ar8, X, Y, s and n are as specified in the specification. The above-mentioned aromatic polycarbonate resin is provided with charge transporting properties.

Abstract: A conductive composition including a mixture of a reaction product ofa hole transporting hydroxy functionalized aryl amine,a hydroxy functionalized arylamine that is different from the hole transporting hydroxy functionalized aryl amine,a cross linkable polyamide, andand an acid capable of simultaneously cross linking the polyamide and oxidizing a portion of the hydroxy functionalized arylamine,the mixture of a reaction product includinga hole transporting hydroxy functionalized aryl amine andan oxidized hydroxy functionalized aryl amine in aa crosslinked polyamide matrix.Other embodiments including processes for applying the aforementioned composition and processes for using devices containing the compositions in high speed laser printing and related printing systems are also disclosed.

Abstract: An electrophotographic photoconductor includes an electroconductive support and a photoconductive layer formed thereon which contains a compound having a charge generating moiety and a charge transporting moiety in the molecule thereof. As such a compound for use in the electrophotographic photoconductor, various compounds having a charge generating moiety derived from an azo compound and a charge transporting moiety derived from a triarylamine compound are proposed. Bisazo and trisazo compounds serving as such compounds are also proposed, together with intermediates for producing the bisazo and trisazo compounds.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon containing an azo pigment of formula (1): ##STR1## wherein R.sup.201 and R.sup.202 are each a hydrogen atom, a halogen atom, an alkyl group, an alkoxyl group or cyano group; and Cp.sup.1 and Cp.sup.2 are each independently a coupler radical represented by formula (2): ##STR2## in which R.sup.203 is a hydrogen atom, an alkyl group or an aryl group; R.sup.204 to R.sup.208 are each a hydrogen atom, nitro group, cyano group, a halogen atom, an alkyl group, trifluoromethyl group, an alkoxyl group, a dialkylamino group, or hydroxyl group; and Z is an atomic group which constitutes a substituted or unsubstituted aromatic hydrocarbon ring, or a substituted or unsubstituted aromatic heterocyclic ring, the azo pigment showing a diffraction peak at a Bragg angle of 26.5.+-.0.8.degree. in the X-ray diffraction spectrum with respect to Cu--K.alpha. ray, and a half-width of 2.degree.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed on the support and contains as an effective component an aromatic polycarbonate resin having a structural unit of formula (I), or the structural unit of formula (I) and a structural unit of formula (II): ##STR1## wherein Ar.sup.1 to Ar.sup.5, R.sup.1, and X are as specified in the specification.

Abstract: The present invention provides a novel stilbene derivative represented by the general formula (1): ##STR1## wherein R.sup.1 and R.sup.3 represent an alkyl group, an aryl group, an aralkyl group or an alkoxy group which are optionally substituted; and R.sup.2 and R.sup.4 represent a hydrogen atom, an alkyl group or an alkoxy group which are optionally substituted, provided that when the substitution position of R.sup.2 and R.sup.4 is the 4-(para) position, R.sup.2 and R.sup.4 are hydrogen atoms, a method for producing the same and use thereof. The above stilbene derivative (1) is useful as an electric charge transferring material, particularly hole transferring material.

Abstract: The present invention provides an electrophotosensitive material comprising a photosensitive layer containing a m-phenylenediamine compound represented by the general formula (1): ##STR1## wherein R.sup.1A and R.sup.1B are the same or different and indicate an alkyl group; and R.sup.1C, R.sup.1D, R.sup.1E and R.sup.1F are the same or different and indicate a hydrogen atom or an alkyl group, which has high sensitivity and issuperior in stability to strong light, durability and heat resistance, and an image forming method capable of realizing more higher speed and more larger energy saving than the prior art.

Abstract: A developer carrying member is comprised of a substrate and a coat layer which covers the surface of the substrate. The coat layer contains at least a binder resin, conductive spherical particles having a number average particle diameter of from 0.3 .mu.m to 30 .mu.m and a true density of 3 g/cm.sup.3 or below, and a nitrogen-containing heterocyclic compound, the particles and the compound being dispersed in the binder resin.

Abstract: An electrophotographic photoconductor includes an electroconductive support and a photoconductive layer formed thereon which contains a compound having a charge generating moiety and a charge transporting moiety in the molecule thereof. As such a compound for use in the electrophotographic photoconductor, various compounds having a charge generating moiety derived from an azo compound and a charge transporting moiety derived from a triarylamine compound are proposed. Bisazo and trisazo compounds serving as such compounds are also proposed, together with intermediates for producing the bisazo and trisazo compounds.

Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer which is formed thereon and contains as an effective component an aromatic polycarbonate resin having a structural unit of formula (1), two structural units of formula (1) and (2), or a repeat unit of formula (3): ##STR1## wherein R.sup.1 and R.sup.z Ar.sup.1 to Ar.sup.6, X, Y, s and n are as specified in the specification. The above-mentioned aromatic polycarbonate resin is provided with charge transporting properties.

Abstract: A material for an organic EL device, having excellent capability of injecting holes from a metal electrode and having durability, and an organic EL device which is imparted with excellent stability in the repeated use for light emission by using the above material, the material having the formula (1), (6) or (7) as specified in claim 1.

Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): ##STR1## wherein Ar.sup.1 to Ar.sup.6, X, n, k and j are as specified in the specification.

Abstract: An electrophotographic imaging member is prepared by forming a dispersion of a charge transport material in a solvent system including at least two non-chlorinated solvents selected from tetrahydrofuran, dioxane and toluene, and applying the dispersion to an electrophotographic imaging member layer by solution coating.

Abstract: There is provided an electrophotographic photoconductor comprising as a charge carrier generating substance a bisazo compound of the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are the same or different, each representing a hydrogen atom, a halogen atom, a lower alkyl group optionally substituted with a fluorine atom, an aralkyl group optionally having a substituent, a lower alkoxy group, or a di-(lower alkyl)amino group; n is an integer from 1 to 3; m is an integer from 1 to 4; and Cp1 and Cp2 are the same or different, each representing an aromatic condensed heterocyclic or aromatic condensed hydrocarbon residue having at least one phenolic hydroxyl group and optionally having a substituted carbamoyl group or a heterocyclic group.

Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): ##STR1## wherein Ar.sup.1 to Ar.sup.6, X, n, k and j are as specified in the specification.

Abstract: In accordance with the present invention, there is provided a phenanthrylenediamine derivative represented by the general formula (1). The derivative is excellent in the electric charge transferring capability, the compatibility with a binding resin and the stability, thereby providing a photosensitive material which is highly sensitive and excellent in the durability. ##STR1## ?wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent a halogen atom, an alkyl group, an alkoxy group or an aryl group; and a, b, c and d each represent an integer from 0 to 5!.

Abstract: An electrophotographic photosensitive member has a support and a photosensitive layer provided thereon. The photosensitive layer contains a hindered phenol compound and a fluorene compound represented by the following formula (1): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently substituted or unsubstituted aryl, and R.sub.5 and R.sub.6 are each independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl.

Abstract: The present invention provides a novel naphthylenediamine derivative which is superior in electric charge transferring capability, compatibility with binding resin and stability, and an electrophotosensitive material which has a higher sensitivity and an excellent durability. The above naphthylenediamine derivative is represented by the following general formula (1), and the electrophotosensitive material is formed by providing a photosensitive layer having this naphthylenediamine derivative as an electric charge transferring material on a conductive substrate. ##STR1## wherein R.sup.1 to R.sup.4, R.sup.5a to R.sup.5f and a to d are as defined.

Abstract: A method of manufacturing solvent-soluble charge transporting materials capable of imparting charge-tranporting properties to polysiloxane resins. These materials have the formula A-?R.sup.1 SiR.sup.2.sub.3-n Q.sub.n !.sub.p where A is a tertiary amine and organic group derived from a compound having charge transporting properties with an ionization potential of 4.5-6.2 eV; R.sup.1 is an alkylene group of 1-18 carbon atoms; R.sup.2 is a monovalent hydrocarbon group or a monovalent halogen-substituted hydrocarbon group of 1-15 carbon atoms; Q is a hydrolyzable group such as--OR.sup.3 where R.sup.3 is an alkyl group of 1-6 carbon atoms; n and p are each 1-3. This silicon-type charge transporting material is characterized by aromatic groups, and alkoxysilyl groups bonded via hydrocarbon groups onto the aromatic rings.

Abstract: An electrophotographic photoreceptor having a photosensitive layer containing an arylamine type compound on an electroconductive substrate,the arylamine type compound having the formula (1), ##STR1## wherein X.sub.1 has the formula (2);.paren open-st.CR.sub.7 .dbd.CR.sub.8 .paren close-st..sub.i --CR.sub.9 .dbd.CR.sub.10 R.sub.11 (2),andX.sub.2 has the formula (2');.paren open-st.CR.sub.12 .dbd.CR.sub.13 .paren close-st..sub.h --CR.sub.14 .dbd.CR.sub.15 R.sub.16 (2').

Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): ##STR1## wherein Ar.sup.1 to Ar.sup.6, X, n, k and j are as specified in the specification.

Abstract: The present invention provides a trinitrofluorenonimine derivative represented by the general formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and indicate an alkyl group which may have a substituent.Such a derivative is superior in electron transferring capability. Accordingly, the electrophotosensitive material having the photosensitive layer containing this derivative is superior in sensitivity.

Abstract: In the invention, there is provided an electrophotographic photoreceptor comprising a conductive substrate and a photosensitive layer formed thereon, said photosensitive layer containing an arylamine hydrazone compound represented by the following formula ?I!.

Abstract: A photoconductive imaging member comprised of a starburst aromatic amine compound of the formula ##STR1## wherein N is nitrogen; A.sup.1 to A.sup.3 each individually represent biaryl; R.sub.a, R.sub.b, and R.sub.c independently represent one of the groups of the following formulas ##STR2## wherein N is nitrogen; each Ar.sup.1 and Ar.sup.2 are aryl; R.sub.1 to R.sub.8 are substituents independently selected from the group consisting of hydrogen, halogen, hydrocarbon, and alkoxy; and X represents oxygen, sulfur, or an alkylene.

Abstract: A coated donor roll comprises a core with a coating, the coating comprising a charge transporting polymer, an organic acid metal salt compound, and iodine.

Abstract: There are provided an electrophotographic photoreceptor having a photosensitive layer containing at least one amine compound represented by formula (1): ##STR1## wherein Ar.sub.1 represents a substituted or unsubstituted aryl group; Ar.sub.2 represents a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group or a substituted or unsubstituted anthrylene group; R.sub.1 represents a hydrogen atom, a lower alkyl group or a lower alkoxy group; X represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and Y represents a substituted or unsubstituted aryl group, or a group represented by formula (2) or (3) described in the specification.

Abstract: A diamine compound of the following formula (1): ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR2## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group.

Abstract: A photoconductor for electrophotography includes a conductive substrate; an undercoating layer formed on the conductive substrate; a charge generation layer formed on the undercoating layer; and a charge transport layer formed on the charge generation layer, wherein the undercoating layer comprises a coating film containing as the main constituent thereof an addition compound containing iodine added thereto, and wherein the charge generation layer comprises a P-type charge generation material containing iodine added thereto.

Abstract: A photoconductor for electrophotography includes a distyryl compound of the general formula (I) as a charge generation material and a bisazo compound of the general formula (II) as a charge transport material.

Abstract: An electrophotographic photosensitive product comprises on a photoconductive substrate a photosensitive layer containing as a main component thereof a compound: ##STR1## wherein X is one of --Ar.sup.7 --CH.dbd.CH--Ar.sup.8 -- and a naphthylene group represented by the following formula: ##STR2## and wherein each of Ar.sup.1, Ar.sup.4, Ar.sup.7, and Ar.sup.8 represents an arylene group, each of Ar.sup.2, Ar.sup.3, Ar.sup.5, and Ar.sup.6 represents an aryl group, and each of R.sup.1 -R.sup.6 represents one of H, a lower alkyl group and an aryl group.

Abstract: A stilbene compound is disclosed which has the following general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each stand for hydrogen, an alkyl group or an acyl group and Ar.sup.1 and Ar.sup.2 each stand for a monovalent homocyclic aromatic group. The stilbene compound may be incorporated into a photoconducting layer of an electrophotographic photoconductor as a charge transporting material. A process for the production of the stilbene compound is also disclosed.

Abstract: An electrophotographic photoconductor includes an electroconductive substrate, and a photoconductive layer formed thereon containing at least one tertiary amine compound of formula (I) as an effective component: ##STR1## wherein Ar.sup.1 and Ar.sup.3 each is an aryl group which may have a substituent; Ar.sup.2 is a bivalent group of a carbocyclic aromatic compound or a bivalent group of a heterocyclic compound; R.sup.1 is a hydrogen atom, an alkyl group which may have a substituent or an alkoxyl group which may have a substituent; and R.sup.2 is a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent. A novel triphenylamine compound for use in the electrophotographic photoconductor is provided.

Abstract: A triarylamine compound useful as a charge transport material of an electrophotographic photoreceptor, which represented by formula (I) ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represents a phenyl group or a condensed ring group.

Abstract: An electrophotographic photoconductor comprises an electroconductive substrate and a photoconductive layer formed thereon comprising as an effective component at least one pyrenylamine derivative of formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, W, j, k, l, m and n are specifically defined in the specification. Furthermore, a novel pyrenylamine derivative for use in the above electrophotographic photoconductor, an aldehyde compound, which is an intermediate for producing the pyrenylamine derivative, and methods of preparing the pyrenylamine derivative and the aldehyde compound are disclosed.

Abstract: A triphenylamine derivative, a charge-transporting material comprising the triphenylamine derivative, and an electrophotographic photoreceptor containing a charge-transporting layer comprising the triphenylamine derivative are disclosed, wherein the triphenylamine derivative is represented by the following general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 may be the same or different and each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a halogen atom, or an aryl group which may have a substituent, or R.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4 may be taken together to form a ring, and n represents 0 or 1.

Abstract: An electrophotographic photoconductor having an electroconductive support and a photoconductive layer formed thereon containing as a photoconductive material at least one carbonate compound of formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each is hydrogen, an alkyl group which may have a substituent, an aryl group which may have a substituent, or a condensed polycyclic group; Y is a bivalent arylene group which may have a substituent, ##STR2## in which Ar.sup.1 and Ar.sup.2 each is an arylene group which may have a substituent, R.sup.3 and R.sup.4 each is hydrogen, an alkyl group which may have a substituent or an aryl group which may have a substituent, and l is an integer of 1 or 2; and R.sup.1 and R.sup.2, or R.sup.1 and Y may independently form a ring; X is an alkyl group which may have a substituent or an aryl group which may have a substituent; m is an integer of 0 or 1; and n is an integer of 0 to 6.

Abstract: Novel trisarylaminobenzene derivatives are represented by the formula: ##STR1## wherein .PHI..sub.11, .PHI..sub.21, and .PHI..sub.31 are independently divalent aromatic ring residues, R.sub.11, R.sub.21, and R.sub.31 are independently groups represented by --N.PHI..sub.01 .PHI..sub.02, --NH.PHI..sub.01, --NR.sub.01 .PHI..sub.01, --.PHI..sub.01, --O.PHI..sub.01 or --S.PHI..sub.01 wherein each of .PHI..sub.01 and .PHI..sub.02 is a monovalent aromatic ring residue, and R.sub.01 is an alkyl group, at least one of R.sub.11, R.sub.21, and R.sub.31 being a group represented by --N.PHI..sub.01 .PHI..sub.02, --NH.PHI..sub.01 or --NR.sub.01 .PHI..sub.01, and A.sub.12, A.sub.22, and A.sub.32 are independently aromatic residues, alkyl groups or hydrogen. An organic electroluminescent element which uses the compound in an organic compound layer, especially in a hole injection transport layer provides uniform plane light emission and is durable enough to maintain luminance.

Abstract: An electrophotographic photoreceptor is herein disclosed which comprises a conductive support and a photosensitive layer formed on the conductive support, and the photosensitive layer contains an enamine derivative as a carrier transport material represented by the formula ##STR1## wherein Ar is an aryl group which may have a substituent, a heterocyclic group which may have a substituent, an aralkyl group which may have a substituent, or a heterocyclic substituted alkyl group; and n is 2, 3 or 4.The electrophotographic photoreceptor is excellent in sensitivity and durability.